| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U U Y Y V V Y Y % |
| % U U Y Y V V Y Y % |
| % U U Y V V Y % |
| % U U Y V V Y % |
| % UUU Y V Y % |
| % % |
| % % |
| % Read/Write 16bit/pixel Interleaved YUV Image Format % |
| % % |
| % Software Design % |
| % Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2020 ImageMagick Studio LLC, a non-profit organization % |
| % dedicated to making software imaging solutions freely available. % |
| % % |
| % You may not use this file except in compliance with the License. You may % |
| % obtain a copy of the License at % |
| % % |
| % https://imagemagick.org/script/license.php % |
| % % |
| % Unless required by applicable law or agreed to in writing, software % |
| % distributed under the License is distributed on an "AS IS" BASIS, % |
| % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % |
| % See the License for the specific language governing permissions and % |
| % limitations under the License. % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % |
| */ |
| |
| /* |
| Include declarations. |
| */ |
| #include "MagickCore/studio.h" |
| #include "MagickCore/blob.h" |
| #include "MagickCore/blob-private.h" |
| #include "MagickCore/cache.h" |
| #include "MagickCore/color.h" |
| #include "MagickCore/colorspace.h" |
| #include "MagickCore/exception.h" |
| #include "MagickCore/exception-private.h" |
| #include "MagickCore/image.h" |
| #include "MagickCore/image-private.h" |
| #include "MagickCore/list.h" |
| #include "MagickCore/magick.h" |
| #include "MagickCore/memory_.h" |
| #include "MagickCore/monitor.h" |
| #include "MagickCore/monitor-private.h" |
| #include "MagickCore/pixel-accessor.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/static.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/module.h" |
| |
| /* |
| Forward declarations. |
| */ |
| static MagickBooleanType |
| WriteUYVYImage(const ImageInfo *,Image *,ExceptionInfo *); |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d U Y V Y I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadUYVYImage() reads an image in the UYVY format and returns it. It |
| % allocates the memory necessary for the new Image structure and returns a |
| % pointer to the new image. |
| % |
| % The format of the ReadUYVYImage method is: |
| % |
| % Image *ReadUYVYImage(const ImageInfo *image_info, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image_info: the image info. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| static Image *ReadUYVYImage(const ImageInfo *image_info, |
| ExceptionInfo *exception) |
| { |
| Image |
| *image; |
| |
| MagickBooleanType |
| status; |
| |
| register ssize_t |
| x; |
| |
| register Quantum |
| *q; |
| |
| ssize_t |
| y; |
| |
| unsigned char |
| u, |
| v, |
| y1, |
| y2; |
| |
| /* |
| Open image file. |
| */ |
| assert(image_info != (const ImageInfo *) NULL); |
| assert(image_info->signature == MagickCoreSignature); |
| if (image_info->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", |
| image_info->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| image=AcquireImage(image_info,exception); |
| if ((image->columns == 0) || (image->rows == 0)) |
| ThrowReaderException(OptionError,"MustSpecifyImageSize"); |
| if ((image->columns % 2) != 0) |
| image->columns++; |
| (void) CopyMagickString(image->filename,image_info->filename, |
| MagickPathExtent); |
| status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| return(DestroyImage(image)); |
| if (DiscardBlobBytes(image,image->offset) == MagickFalse) |
| ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| image->filename); |
| image->depth=8; |
| if (image_info->ping != MagickFalse) |
| { |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| status=SetImageExtent(image,image->columns,image->rows,exception); |
| if (status == MagickFalse) |
| return(DestroyImageList(image)); |
| /* |
| Accumulate UYVY, then unpack into two pixels. |
| */ |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| break; |
| for (x=0; x < (ssize_t) (image->columns >> 1); x++) |
| { |
| u=(unsigned char) ReadBlobByte(image); |
| y1=(unsigned char) ReadBlobByte(image); |
| v=(unsigned char) ReadBlobByte(image); |
| y2=(unsigned char) ReadBlobByte(image); |
| SetPixelRed(image,ScaleCharToQuantum(y1),q); |
| SetPixelGreen(image,ScaleCharToQuantum(u),q); |
| SetPixelBlue(image,ScaleCharToQuantum(v),q); |
| q+=GetPixelChannels(image); |
| SetPixelRed(image,ScaleCharToQuantum(y2),q); |
| SetPixelGreen(image,ScaleCharToQuantum(u),q); |
| SetPixelBlue(image,ScaleCharToQuantum(v),q); |
| q+=GetPixelChannels(image); |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| SetImageColorspace(image,YCbCrColorspace,exception); |
| if (EOFBlob(image) != MagickFalse) |
| ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| image->filename); |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r U Y V Y I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterUYVYImage() adds attributes for the UYVY image format to |
| % the list of supported formats. The attributes include the image format |
| % tag, a method to read and/or write the format, whether the format |
| % supports the saving of more than one frame to the same file or blob, |
| % whether the format supports native in-memory I/O, and a brief |
| % description of the format. |
| % |
| % The format of the RegisterUYVYImage method is: |
| % |
| % size_t RegisterUYVYImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterUYVYImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=AcquireMagickInfo("UYVY","PAL","16bit/pixel interleaved YUV"); |
| entry->decoder=(DecodeImageHandler *) ReadUYVYImage; |
| entry->encoder=(EncodeImageHandler *) WriteUYVYImage; |
| entry->flags^=CoderAdjoinFlag; |
| entry->flags|=CoderRawSupportFlag; |
| entry->flags|=CoderEndianSupportFlag; |
| (void) RegisterMagickInfo(entry); |
| entry=AcquireMagickInfo("UYVY","UYVY","16bit/pixel interleaved YUV"); |
| entry->decoder=(DecodeImageHandler *) ReadUYVYImage; |
| entry->encoder=(EncodeImageHandler *) WriteUYVYImage; |
| entry->flags^=CoderAdjoinFlag; |
| entry->flags|=CoderRawSupportFlag; |
| entry->flags|=CoderEndianSupportFlag; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r U Y V Y I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterUYVYImage() removes format registrations made by the |
| % UYVY module from the list of supported formats. |
| % |
| % The format of the UnregisterUYVYImage method is: |
| % |
| % UnregisterUYVYImage(void) |
| % |
| */ |
| ModuleExport void UnregisterUYVYImage(void) |
| { |
| (void) UnregisterMagickInfo("PAL"); |
| (void) UnregisterMagickInfo("UYVY"); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % W r i t e U Y V Y I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % WriteUYVYImage() writes an image to a file in the digital UYVY |
| % format. This format, used by AccomWSD, is not dramatically higher quality |
| % than the 12bit/pixel YUV format, but has better locality. |
| % |
| % The format of the WriteUYVYImage method is: |
| % |
| % MagickBooleanType WriteUYVYImage(const ImageInfo *image_info, |
| % Image *image,ExceptionInfo *exception) |
| % |
| % A description of each parameter follows. |
| % |
| % o image_info: the image info. |
| % |
| % o image: The image. Implicit assumption: number of columns is even. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| static MagickBooleanType WriteUYVYImage(const ImageInfo *image_info, |
| Image *image,ExceptionInfo *exception) |
| { |
| PixelInfo |
| pixel; |
| |
| Image |
| *uyvy_image; |
| |
| MagickBooleanType |
| full, |
| status; |
| |
| register const Quantum |
| *p; |
| |
| register ssize_t |
| x; |
| |
| ssize_t |
| y; |
| |
| /* |
| Open output image file. |
| */ |
| assert(image_info != (const ImageInfo *) NULL); |
| assert(image_info->signature == MagickCoreSignature); |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickCoreSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| if ((image->columns % 2) != 0) |
| image->columns++; |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| return(status); |
| /* |
| Accumulate two pixels, then output. |
| */ |
| uyvy_image=CloneImage(image,0,0,MagickTrue,exception); |
| if (uyvy_image == (Image *) NULL) |
| return(MagickFalse); |
| (void) TransformImageColorspace(uyvy_image,YCbCrColorspace,exception); |
| full=MagickFalse; |
| (void) memset(&pixel,0,sizeof(PixelInfo)); |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| p=GetVirtualPixels(uyvy_image,0,y,image->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| break; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| if (full != MagickFalse) |
| { |
| pixel.green=(pixel.green+GetPixelGreen(uyvy_image,p))/2; |
| pixel.blue=(pixel.blue+GetPixelBlue(uyvy_image,p))/2; |
| (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.green)); |
| (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.red)); |
| (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.blue)); |
| (void) WriteBlobByte(image,ScaleQuantumToChar( |
| GetPixelRed(uyvy_image,p))); |
| } |
| pixel.red=(double) GetPixelRed(uyvy_image,p); |
| pixel.green=(double) GetPixelGreen(uyvy_image,p); |
| pixel.blue=(double) GetPixelBlue(uyvy_image,p); |
| full=full == MagickFalse ? MagickTrue : MagickFalse; |
| p+=GetPixelChannels(uyvy_image); |
| } |
| status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| uyvy_image=DestroyImage(uyvy_image); |
| (void) CloseBlob(image); |
| return(MagickTrue); |
| } |
